State Highway 21 in Missouri: fatal crashes
From 2015 to 2024, 70 fatal crashes on State Highway 21 in Missouri killed 74 people, the 21st most of 251 numbered roads in Missouri. In 2024 there were 7 fatal crashes and 8 deaths on the road.
A state highway running through 7 counties of Missouri. All fatal crashes in Missouri.
Deaths on State Highway 21 in Missouri by year
| Year | Fatal crashes | Deaths |
|---|---|---|
| 2024 | 7 | 8 |
| 2023 | 7 | 8 |
| 2022 | 9 | 9 |
| 2021 | 7 | 7 |
| 2020 | 7 | 7 |
| 2019 | 9 | 10 |
| 2018 | 4 | 4 |
| 2017 | 6 | 6 |
| 2016 | 7 | 7 |
| 2015 | 7 | 8 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Where on State Highway 21 in Missouri: the counties with the most fatal crashes
Jefferson County had the most fatal crashes on State Highway 21 from 2015 to 2024: 21, with 22 deaths. Jefferson, Washington and Reynolds counties together held 79% of fatal crashes on State Highway 21 in Missouri from 2015 to 2024; the 4 listed held 87%. Counties are listed from 5 fatal crashes.
| County | 2024 | 2015 to 2024 | Deaths | |
|---|---|---|---|---|
| 1 | Jefferson County | 1 | 21 | 22 |
| 2 | Washington County | 4 | 20 | 22 |
| 3 | Reynolds County | 2 | 14 | 15 |
| 4 | St. Louis County | 0 | 6 | 6 |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
When fatal crashes happen on State Highway 21 in Missouri
70 fatal crashes on State Highway 21 in Missouri from 2015 to 2024 have a known time, too few for any one weekday and time of day to stand out. The worst hour is 6 am to 7 am; the worst month is May.
| Midnight to 4 | 4 to 8 am | 8 to noon | Noon to 4 | 4 to 8 pm | 8 to midnight | |
|---|---|---|---|---|---|---|
| Sun | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 4.3 percent, 3 fatal crashes | 0.0 percent, 0 fatal crashes | 2.9 percent, 2 fatal crashes |
| Mon | 2.9 percent, 2 fatal crashes | 1.4 percent, 1 fatal crash | 4.3 percent, 3 fatal crashes | 7.1 percent, 5 fatal crashes | 2.9 percent, 2 fatal crashes | 1.4 percent, 1 fatal crash |
| Tue | 0.0 percent, 0 fatal crashes | 2.9 percent, 2 fatal crashes | 4.3 percent, 3 fatal crashes | 1.4 percent, 1 fatal crash | 5.7 percent, 4 fatal crashes | 4.3 percent, 3 fatal crashes |
| Wed | 0.0 percent, 0 fatal crashes | 4.3 percent, 3 fatal crashes | 5.7 percent, 4 fatal crashes | 2.9 percent, 2 fatal crashes | 2.9 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes |
| Thu | 0.0 percent, 0 fatal crashes | 7.1 percent, 5 fatal crashes | 2.9 percent, 2 fatal crashes | 4.3 percent, 3 fatal crashes | 8.6 percent, 6 fatal crashes | 1.4 percent, 1 fatal crash |
| Fri | 1.4 percent, 1 fatal crash | 1.4 percent, 1 fatal crash | 2.9 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes | 2.9 percent, 2 fatal crashes | 0.0 percent, 0 fatal crashes |
| Sat | 0.0 percent, 0 fatal crashes | 0.0 percent, 0 fatal crashes | 1.4 percent, 1 fatal crash | 1.4 percent, 1 fatal crash | 1.4 percent, 1 fatal crash | 1.4 percent, 1 fatal crash |
By hour
By month
- Jan4.3%
- Feb4.3%
- Mar8.6%
- Apr7.1%
- May14.3%
- Jun11.4%
- Jul5.7%
- Aug8.6%
- Sep8.6%
- Oct8.6%
- Nov10.0%
- Dec8.6%
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
What fatal crashes on State Highway 21 in Missouri first hit
The first harmful event was a fixed object such as a tree, pole or barrier in 43%; a collision with another vehicle in 34%, a rollover in 5.7%, a pedestrian in 4.3%.
| First harmful event | Fatal crashes | Share |
|---|---|---|
| Fixed object (tree, pole, barrier, ditch) | 30 | 43% |
| Collision with another vehicle | 24 | 34% |
| Other | 9 | 13% |
| Rollover | 4 | 5.7% |
| Pedestrian | 3 | 4.3% |
| Cyclist | 0 | 0.0% |
| Parked vehicle | 0 | 0.0% |
| Not reported | 0 | 0.0% |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
How fatal crashes on State Highway 21 in Missouri compare with the state
The largest difference from Missouri: from 2015 to 2024, 78% of fatal crashes on State Highway 21 in Missouri were on rural roads, against 52% across Missouri. Below the Missouri share: drinking drivers and pedestrians. Shares of fatal crashes from 2015 to 2024, against the share across all of Missouri. A share is only given over 20 crashes; above or below means more than chance would give on 70 crashes.
| State Highway 21 | Missouri | ||
|---|---|---|---|
| On rural stretches | 78% | 52% | above the Missouri share |
| At or near an intersection | 16% | 21% | about the same as the Missouri share |
| In the dark, road unlit | 31% | 28% | about the same as the Missouri share |
| A drinking driver | 16% | 28% | below the Missouri share |
| Speeding | 27% | 37% | about the same as the Missouri share |
| A distracted driver (as recorded) | 7.1% | 8.9% | about the same as the Missouri share |
| Occupants killed unbelted | 68% | 63% | about the same as the Missouri share |
| Hit-and-run | 1.4% | 5.2% | about the same as the Missouri share |
| A motorcycle involved | 13% | 15% | about the same as the Missouri share |
| Pedestrians among the dead | 4.1% | 12% | below the Missouri share |
Source: NHTSA Fatality Analysis Reporting System (FARS), 2024 Annual Report File (released April 2026, subject to revision). How we count
Questions about fatal crashes on State Highway 21 in Missouri
- How many fatal crashes have there been on State Highway 21 in Missouri?
- 70 fatal crashes killed 74 people on State Highway 21 in Missouri from 2015 to 2024. In 2024 there were 7 fatal crashes and 8 deaths. Source: NHTSA's Fatality Analysis Reporting System (FARS).
- Where on State Highway 21 in Missouri do the most fatal crashes happen?
- Jefferson County had the most fatal crashes on State Highway 21 from 2015 to 2024: 21, with 22 deaths. Washington County was second with 20.
Other roads in Missouri with a page
- I-270
- I-435
- I-44
- I-49
- I-55
- I-70
- State Highway 100
- State Highway 13
- State Highway 30
- State Highway 32
- State Highway 43
- State Highway 5
All fatal crashes in Missouri, with every road ranked.
Where the State Highway 21 numbers come from
Counted from NHTSA's Fatality Analysis Reporting System, 2024 Annual Report File: every fatal crash whose road NHTSA filed as State Highway 21 in Missouri (filed under 3 spellings, such as "SR-21", "SR-21 N STATE HWY 21", "SR-21 TESSON FERRY RD"). Ramps, frontage and service roads are left out. Where two routes share a road, NHTSA files each crash under one of them, so a shared stretch counts on one route only. A fatal crash is one in which someone died within 30 days. Totals in state and news reports for a road usually differ: they include ramps and frontage roads, or count from preliminary reports. The full method.